FilterBehavior.ActualFilterCriteriaChanged Event
In This Article
Occurs when the filter criteria is changed.
Namespace: DevExpress.Xpf.Core.FilteringUI
Assembly: DevExpress.Xpf.Grid.v24.2.dll
NuGet Package: DevExpress.Wpf.Grid.Core
#Declaration
public event EventHandler ActualFilterCriteriaChanged
#Event Data
The ActualFilterCriteriaChanged event's data class is EventArgs.
#Remarks
The following code sample shows how to use the FilterBehavior to make the Filter Elements filter the ViewModel’s data.
<dxa:AccordionControl>
<dxmvvm:Interaction.Behaviors>
<dxfui:FilterBehavior x:Name="filterBehavior" ActualFilterCriteriaChanged="filterBehavior_ActualFilterCriteriaChanged">
<dxfui:FilterField FieldName="CategoryName">
<dxe:ComboBoxEditSettings ItemsSource="{Binding Categories}"/>
</dxfui:FilterField>
</dxfui:FilterBehavior>
</dxmvvm:Interaction.Behaviors>
<dxfui:CheckedListFilterElement FieldName="CategoryName" />
<dxfui:CheckBoxFilterElement FieldName="Discontinued" />
<!-- -->
</dxa:AccordionControl>
<!-- -->
<dxe:ListBoxEdit Name="listBoxEdit" ItemsSource="{Binding Products}">
<!-- -->
</dxe:ListBoxEdit>
void filterBehavior_ActualFilterCriteriaChanged(object sender, EventArgs e) {
var viewModel = (FilterBehaviorServerDataViewModel)DataContext;
if(ReferenceEquals(filterBehavior.ActualFilterCriteria, null)) {
viewModel.SetFilter(null);
} else {
var converter = new GridFilterCriteriaToExpressionConverter<ProductInfo>();
var expression = converter.Convert(filterBehavior.ActualFilterCriteria);
viewModel.SetFilter(expression);
}
}
See Also